放牧地是苏联多数地区夏季饲料的主要来源。但是家畜对放牧地上草层的采食率不是始终都高。如在新西伯利亚省较好的人工草地上采食率只占70%。放牧前半期饲草的损失最大,此时牧草同时急骤生长,6月份在西西伯利亚条件下人工草地上主要草层是无芒雀麦,通常形成这种情况:即在未放牧地段草层长得过高,而 Grazing land is the main source of summer feed in most parts of the Soviet Union. However, animal feed rates to grazing grass are not always high. For example, only 70% of the feed on the better artificial grass in Novosibirsk Province. The loss of forage was greatest during the first half of grazing, at the same time the pasture developed rapidly at the same time. In June, the main grass layer on Artificial Grassland in West Siberian was Bromegrass, which usually resulted from the fact that the grasses grew in grazing areas Too high, however